
where the last step holds by using [1]}. Plugging (REF ) into (REF ), \(\tilde{F} \left( x \right)\)  can be finally derived as (REF ). Substituting (REF ) and (REF ) into (REF ), the approximate expression of \(p_{m=1,k}^{out}\)  can be derived. In the similar fashion, the outage probability for arbitrary data stream \(m\) , \(p_{m,k}^{out}\) , can be obtained as (REF ).
